Re: [Bacula-users] Dud tapes

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Hello Dan,

- From what I see, the end of tape marker is missing or is too close to the physical end of the tape. I suspect that causes Bacula to write to the very physical end, and thus it cannot write the final EOF mark. Despite what Bacula says (it is being conservative) there is every chance that your tape is good.

To know, you must restore the last file that was being written when the error occurred and see if it is correctly restored.

Best regards,
Kern

On 01.05.2015 15:40, Dan Langille wrote:
>
> I'm using Bacula 7.0.5 on FreeBSD 10.1 (bacula-dir) and FreeBSD 9.3 (bacula-sd).
>
> Sometimes I get dud tapes. Or at least, tapes my tape drive does not like.
>
> For example:
>
> ###
> 01-May 09:39 crey-sd JobId 205441: End of Volume "FAI022" at 11:11326 on device "DTL03" (/dev/nsa0). Write of 64512 bytes got 49152.
> 01-May 09:39 crey-sd JobId 205441: Error: Error writing final EOF to tape. This Volume may not be readable.
> tape_dev.c:941 ioctl MTWEOF error on "DTL03" (/dev/nsa0). ERR=Input/output error.
> 01-May 09:39 crey-sd JobId 205441: End of medium on Volume "FAI022" Bytes=10,784,406,528 Blocks=167,168 at 01-May-2015 09:39.
> 01-May 09:39 crey-sd JobId 205441: 3307 Issuing autochanger "unload slot 2, drive 0" command.
> ###
>
> See also, this from /var/log/messages:
>
> ###
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 01 00
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x28b4b
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x28b4b
> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 01 00
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x11fb
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x11fb
> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
> ###
>
> In this case, I will mark the tape as DISABLED and once it is past it's recycling date, I will retire the tape.
>
> Best practice might be to rerun the backup, but this backup is also on disk.
>
> What do you usually do with tapes such as this?
>
>
> —
> Dan Langille
> http://langille.org/
>
>
>
>
>
>
>
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